Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems

doi:10.1016/j.ejsobi.2021.103299

	Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems
	Chi, Qiao-Dong ; Wang, Jing 1; Liu, Yu-Qing ; Zhao, Jun 3; Cheng, Yi 3; Cai, Zu-Cong ; Feng, Xiao-Juan; Zhang, Jin-Bo
	2021
发表期刊	EUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN	1164-5563
卷号	104
摘要	Soil nitrogen (N) availability, which is primarily controlled by climate and soil properties, may play a key role in regulating biomass production in natural grasslands. However, how climate, soil properties, and gross N dynamics interact in their regulation of biomass production in natural grassland ecosystems in climate-sensitive biomes remains largely unclear. We quantified gross N transformation rates using the 15N dilution technique and the abundance of bacteria, fungi, ammonia-oxidizing archaea, and bacteria in the topsoil (0-10 cm) and subsoil (30-40 cm) in four natural grassland ecosystems along an altitudinal gradient from the Inner Mongolian (IM) to the Qinghai-Tibet (QT) plateaus. The results showed that gross N mineralization rates were generally greater in the topsoil (1.28-4.79 mg N kg-1 soil d-1) than in the subsoil (0.19-0.93 mg N kg-1 soil d-1) in all four grasslands. Gross nitrification rates were also consistently greater in the topsoil (2.42-6.48 mg N kg- 1 soil d-1) than in the subsoil (<1.43 mg N kg- 1 soil d-1) in all four grasslands. Gross nitrification rates were positively correlated with gross N mineralization rates, suggesting that soil nitrification was probably substrate limited. We present evidence of different interactive effects of climate, soil properties, and gross N dynamics on biomass production between the topsoil and the subsoil. In the topsoil, mean annual precipitation influenced gross N mineralization by altering total microbial activity and, in turn, influencing aboveground biomass. However, mean annual temperature influenced underground biomass through altering gross N mineralization in the subsoil. Climate influences biomass production by directly and indirectly regulating soil gross N mineralization in natural grasslands from the IM to the QT plateaus. The findings of the present study could facilitate better prediction of soil N availability for plants in natural grasslands under projected global climate change scenarios.
关键词	Grassland soil Gross N mineralization Gross nitrification Aboveground biomass Abiotic N immobilization 15N labelling technique
学科领域	Ecology ; Soil Science
DOI	10.1016/j.ejsobi.2021.103299
收录类别	SCI
语种	英语
WOS关键词	ORGANIC-MATTER ; N MINERALIZATION ; FOREST ECOSYSTEMS ; NITRIFICATION ; RETENTION ; CHINA ; TRANSFORMATIONS ; PHOSPHORUS ; SIMULATION ; RESPONSES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000651274700005
出版者	ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
文献子类	Article
出版地	ISSY-LES-MOULINEAUX
EISSN	1778-3615
资助机构	National Natural Science Foundation of China [41830642, 41807093, 41977032]
作者邮箱	ycheng@njnu.edu.cn
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26574
专题	植被与环境变化国家重点实验室
作者单位	1.Nanjing Normal Univ, Sch Geog, Nanjing 210023, Peoples R China 2.Nanjing Forestry Univ, Coll Forestry, Nanjing 210037, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 4.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Peoples R China 5.State Key Lab Cultivat Base Geog Environm Evolut, Nanjing 210023, Peoples R China 6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 7.Nanjing Normal Univ, Minist Educ, Key Lab Virtual Geog Environm, Nanjing 210023, Peoples R China 8.Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing 210023, Peoples R China
推荐引用方式 GB/T 7714	Chi, Qiao-Dong,Wang, Jing,Liu, Yu-Qing,et al. Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2021,104.
APA	Chi, Qiao-Dong.,Wang, Jing.,Liu, Yu-Qing.,Zhao, Jun.,Cheng, Yi.,...&Zhang, Jin-Bo.(2021).Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems.EUROPEAN JOURNAL OF SOIL BIOLOGY,104.
MLA	Chi, Qiao-Dong,et al."Varying interactive effects of climate, soil properties, and gross nitrogen dynamics on biomass production between the topsoil and the subsoil in natural grassland ecosystems".EUROPEAN JOURNAL OF SOIL BIOLOGY 104(2021).

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